quick and dirty temperature logger

main.py

from picographics import PicoGraphics, DISPLAY_PICO_EXPLORER, PEN_RGB332
from pimoroni_i2c import PimoroniI2C
from breakout_bme68x import BreakoutBME68X
from pimoroni import Button
from time import ticks_ms
from math import floor

display = PicoGraphics(display=DISPLAY_PICO_EXPLORER, pen_type=PEN_RGB332)
black_pen = display.create_pen(0, 0, 0)
white_pen = display.create_pen(255, 255, 255)
temp_pen = display.create_pen(255, 255, 255)
red_pen = display.create_pen(255, 0, 0)
green_pen = display.create_pen(0, 255, 0)
blue_pen = display.create_pen(0, 0, 255)


PINS_PICO_EXPLORER = {"sda": 20, "scl": 21}
i2c = PimoroniI2C(**PINS_PICO_EXPLORER)
bme = BreakoutBME68X(i2c)

button_a = Button(12, invert=True)
button_b = Button(13, invert=True)
button_x = Button(14, invert=True)
button_y = Button(15, invert=True)

with open("temps.log", "a") as f:
  logging = False
  
  last_tick = 0
  while True:
    tick = floor(ticks_ms() / 1000)
    temperature = bme.read()[0]

    display.set_pen(black_pen)
    display.clear()
  
    display.set_pen(white_pen)
    display.text("Logger", 8, 8)
    display.text("T=%i" % (tick), 90, 8)
    
    display.set_pen(temp_pen)
    display.text("%.1fC" % (temperature), 190, 8)
  
    display.set_pen(blue_pen)
    display.rectangle(160, 40, 80, 40)
    display.set_pen(black_pen)
    display.text("Break", 172, 52)
    
    display.set_pen(red_pen if logging else green_pen)
    display.rectangle(160, 160, 80, 40)
    display.set_pen(black_pen)
    display.text("Stop" if logging else "Start", 172, 172)
    
    display.update()
  
    if button_x.read():
      display.set_pen(blue_pen)
      display.clear()
      display.update()
      break

    if button_y.read():
      logging = not logging

      if logging:
        f.write("--- NEW SESSION ---\n")

    if logging and last_tick is not tick:
      last_tick = tick
      f.write("%i %.1f\n" % (tick, temperature))